Tractor attached implement



May `l8,-1943 `5%."1.. DEWEY TRACTOR ATTACHED IMPLEMENT Filed Nov. 29, 194o 2 sheets-sheet 2 -lndermk y Paulo .W H way.

"ingly connectedto a tractorl.

. ciated with the implement. j

"Patented May n implement, and more specifically to an improved are trailmeans for adjustingimplements which j vIt is; desirable toutilize f the power plant or Vlifting device provided on modern type=tractors `,to adjust implements `which are trailingly contnected to the tractor.` 4Howevexg` when, implef mentsof the trail-behind type aregconnectedto il the tractor, the application of utilizingathe DOWer f .plant onthe tractortoadjust .thextrailbehind implement involves` many fp roblems 11 or exa ampia: inthe *ca se ofimplements jhaving earthi 1 i workingttools itis desirableto connect the impleinent to the tractor in such a 'manner `thatit .may release under overload, and consequently l the `power lift device means must also disconnect on release ofthe implement;

Itis, therefore, an obj` t of the presentinventionto provide asimple and efcient lifting mechanismwhich may b'e adjusted to raise and lower V'an `implement ltrailingly, connected to the C `tractor. a Another object oftheinventionisto provide i a novel meanslforconnectingV pleinent to ai tractor."

other object of areleasable draft meansforjconnectiligfthe iinf pleinent to the tractor `and?toflrvide a`.releas tlible connection for'the adjustingdevice which' is mounted Aon the tractor and ,l operatively asso- Another object 'of thel invention isto provide "1 ajhitchdevice and an adjusting device for connecting a trail-behind-implement tof a tractor @which will not vary the operating,r `p ofsitionfof'` a ranabenmq implement); f

" uidpower device are"connectedtotheimplement and to Vthetractor in` such aimanner that "the fcoxmect'ons thereof form a parallelograin when the implement is `in its ground-working position.

ternational Harvester t Aliatnnvember '29,5194'0, seriinaA '3367;758" L` l )This inventionrelates 4t0 a i;raetor attached n eTTAoHEnIm `rederickfliillevvey,lantomlll.; assignor to j "Campane a @swam between the `vinn'ilement; and, the tractor permits t `relativemovement between the tractorand the `tureshown inFigure, 1; and,

l hydraulic pump I5 is controlled bya lever I6;

and a conduit YI'Iextends from-the pump I5 :at the side ofthe tractor.4 ;Atthe rear-of the tractor- `is providedv the usual operators station VI8 and steeringdevicelf According to the present invention, any suitable -type' of trail-#behind implement fis connected to the tractor bya hitcheonnection whichlisre@ `leasable-under overload. Afluid power device is connectedtothe tractor and operatively associ- 1' ated withthe implementgin such a manner that, l upol` Operation of the iluid power device, a force p .f is"` transmitted by' thefiluid 'powerdevice iny a direction opposedto the lineoi` draft between "I the tractor and the implementto adjustthe lat` ter, and, upon releaseof the hitch connection, the iiuidpower device is 4disconnec :table Lfrom the implement. The hitch connection` and the implement, /but doesnot `affect ltion of the implement.n

portinfZl and apair of spaced ,ears

These and otherobjects and advantages., o f

the present invention will becomeapparentfto those skilled in the artafter a c arefulconsidera-4 tion of the following detailed description of a Ipreferred structural embodiment ofthe invenl04 drawlngs, in which: o.

on, reference beinghad to the accompanying `Figure 1 isa" plan vievv oi a tractor and trailbehind impiementwmchfis connected' thereto by` the novelhitch and'adiusjtingfdevice; Figure 2` is a side elevational view of the Figure3- isV an enlarged sectional view of the bracketstructure provided onf-"1a tractor.

Referring to Figure2 ofthe drawings, the usual tractorl is shown, which consists ofa body portion I I at the rear rend of `which extend transverse rear`v` axle `housings I2, fromA which extend rear "axles I3. Wheels `I4 are adjustably secured on f the axlesy I3. A power plant orpowerlift device in the formof `a hydraulic-,-pumpl I5 is provided within the bodygportionJ Iof the tractor I0. The

Asshown in Figure 2, the lever IGwhich controls the hydraulic; pump I5, is within-reach of the operator of the tractorf. On lthe rear axle 35- housing member `I2 is: secured the usual `draw bar or draft device 2I,`which may be secured to the rear. axle housing in any desirable manner.

In the present c ase, howeventhe' drawbar 2l l comprises a U-shaped member 22 which is secured to downwardly extending members 22a, 'which are secured `to the housings I 2, `anda longitudinally v` ldisposed" draft member 23,' which is seured to the tractor body by a bolt 24, extends rearwardly overthe U-shaped. member 2'2.` 'A bracket structure 25 is secured tothe end ofthe longitudinally disposed draft member fzs byajboir ze. EThe l` bracket `stucture25 consists of a hitch-engaging 28M in which areprovided alined openings 29.1 i 'Y An `implement in thefo'rm of a'plow 3|Y is trailingly connectedtotheibracket structure l25 by a releasable hitch'connectionZ. The'plow3l com- A prises a pairof 'spacedV longitudinally" disposed beams 32a`J which are heldin spaced relation by The parallel link or the parallelogram connectionnnd brackets `33. l The rear end fof each of the beams the operating posiengage the usual notches provided tor 55.

an earth-working tool in the form of a plow bottom 34 is secured to each of the beams 32a. At the front end ofeach of the beams 32a. is secured a vertical plate 35. The plow 3| is supported on a land wheel 36 which is journaled on a. crank axle 31 that is journaled in alined openings in a bracket struc-ture 38'provided on each of the beams 32a. The plow lis also supported on a furrow wheel 39, which is journaled on another vcrank axle 4| that is journaled in another set of alined openings in the brackets 38.

The land wheel 36 is adjusted by a hand lever 42. A sector 43 is mounted on the beam 32a, and f VVVinto an operating position, the collar 49 moves into contact with the eye-bolt 46 and determines the plowing depth of the plow. If the plowing depth is to be changed, the lever 42 is adjusted. When the lever`42 is moved downwardly, the wheel 36 is moved downwardly by virtue of the eye-boit 46 contacting the collar 49, and, when the lever 42 is moved upwardly, the wheel 36 is moved upwardly until the collar 49 contacts the eye-bolt 46.

As shown in Figure 2, thecrank axles 31and 4| are provided with arms 53 and 54, respectively. A lever 52. is pivotally connected to a sector 55, which is pivotally mounted by a bolt 55a to the arm 53 provided on the crank axle 31, and the arm 54 is pivotally connected to the lever 52 by a bolt 54a. The lever 52 is also provided with the usual latch mechanism 56, which is adapted to in the sec- Upon adjusting the lever 52, the operating depth of thel plow' bottoms 34 is determined and the plow may be leveled by adjusting the lever 42 which adjuststhe land wheel 36. It is to be noted that the sector55 connects the arms 53 and 54 provided on the crank axles 31 and 4|, respectively. The manual adjustment of the plow is provided for by the levers 42 and 52. The connection for adjusting the plow by power will next be described.

On the crank axle 31 is secured a vertically arranged arm 51, which extends above and below the journal portion of the crankaxle 31. At the lower` end of the arm 51 is pivotally connected a rod 56 which extends rearwardly into an opening provided in a bell crank 59, which is pivotally mounted on one of the beams 32a. Nuts 6| are provided on the rod 58 at either side of the bell crank 59, whereby the effective length of the link 58 may be varied. The other arm of the bell crank 59 has a link 63 connected thereto. A spring 64 is connected to the link 63 and extends forwardly and is connected to the arm 51 above the journal portion of the crank axle 31. As

shown in Figure 2, when the plow is in the operating position, the bell crank is moved into a dead center relation with the arm 51 which assists penetration of the plow bottom 34. When .Y the plow is raised, the spring 64 moves out of this I v2,319,492 I 32a extends downwardly in the usual manner and dead center position and aids in the liftingl of the plow.

On the arm 51 above the journalportion ofthe crank axle 31 is pivotally connected a longitudinally disposed link 65, which extends forwardly and is connected to an arm 61 secured on a transverse rock-shaft 68 that is journaled in alined openings ir. the plate members provided on the front of the plow beams 32a. Collars 69 provided at each end of the rock-shaft 68 hold the rock-shaft in engagement with the plate members 35.

The plate members 35 are provided with the usual clevises 1| between which is connected a transverse bar 12. A longitudinally disposed bar fluid power device 16 is connected to the bracket structure 25` and is operatively associated with the arm 61. The iiuid power device 16 comprises a cylinder 11 in which 'is slidably mounted a piston 18 from which extends a rod 19. The conduit |1 extending from the hydraulic pump I5 is connected to the cylinder 11. As shown in Figure 2, the arm 61 extends below the transverse rockshaft 68 and a suitable sleeve 8| is pivotally connected thereto. 'I'he rod 19 slidinglyr and guidr' ingly engages the sleeve 8|.

It should'be noted that the pivotal connections of the hitch device 32 and the uid power device 16 form a parallelogram .when the plow is in a ground-engaging position. By this parallelogram connection, movement of the tractor relative to the plow does not ail'ect adjustment of the plow v' bottoms 34 as the tractor travels over uneven ground.

A5 previously mentioned, the plow 3| may bey I6, iiuid is supplied from the pump |5 into the 68 in a clockwise direction, which moves the lonconduit |1 from which it is conveyed into the cylinder 11, wherein the piston 16 is moved in a direction opposed to the line of draft between the tractor'and the implement. The movement of the piston 18 through the sleeve 8|, which is connected to the lever 61, rotates the rock-shaft gitudinallyrdisposed link 65 forwardly. The forward movement of the link 65 rotates the arm 51 in a clockwise direction, which moves the crank axle'31 in a clockwise direction. Since the crank axles `31 and 4| are connected by the seetor 55, the land wheel 36 and the furrow wheel 39 are forced downwardly so'as to lift the plow 3|. When it is desired to lower the plow, the fluid is released from the conduit |1 by moving the lever Il 6, and the weight of the plow 3| forces the plow bottoms 34 down into an operating depth which is determined by' the position of the furrow wheel 39.

A normal operating position of the implement is shown in Figure 2. In this position, the plow may move relative to the tractor without affectn ing the operating depth of the plow, since the hitch connection 32 and the iluidrpower device form a parallel link connection between the plow and the tractor, and, when the plow is adjusted, the uid power device acts in a direction opposed to the line oi draft to eiTect adjustment of the plow. Under normal operating positions, the releasable hitch connection 1l remains in engage- A ment with the hitch-engagingportion ofthe bracket structure however, when the plow bottoms 34 strike an obstruction, the `releasable hitch connection releases f rom `the hitch-engaging portion 21. Since the rod 19 of the piston 18 tween the tractor and the implement, the rod 19 `will disengage from the sleeve 8| when the releasable hitch 32 disconnects fromthe bracket structure `25. By ,this construction, the adjustable connection 16. and the hitch connection 14 between the plow and the tractor may be readily reconnected, since the rod` 18 `need only be `inserted in the sleeve 8i and thereleasable hitch connection 1I reconnected to the hitch-engaging portion .25.. The conduit H does not have to be broken and, therefore, the'danger o f spilling the iluid therefrom is eliminated.

From the foregoing description it will-be apparent that .fa novel adjusting device hasjbeen 3 u 3. In combination, a tractor, an implement positioned in trail-behind relationship to the tractor and having an adjustable part, means ,forming a connection releasable under overload Abetweenthe tractor andthe implement, and a u link adjustable in length operatively associated with the tractor and theimplement, for adjusting said adjustable part and disconnectable there- `from upon release of the connection between the slidingly engages the sleeve 8i and operates only `in the direction opposed to the linefof draft beprovided for implements which are trailingly v connected to a tractor.4 The fluid power device andthe hitch connection forma connection between the plow and the tractor, whereby the relativemovement -between theplow and the tractor does not anect the operating Aposition o i` the plow, and, in the event-that theplow strikes an ,i obstruction, thehitch connection breaks away `from the tractor, and theY iluid power device remains connected to the tractor,:bu t releases from fits connection to the implement. The hitch coni `nection and the fluid power device may be read- `ily reconnected to the tractorand to the implementl Although the invention has been explained -by a description in detail of a specific embodiment.

thereof, it is to be understoodthat various changes and modications canbe made in the particular construction shown without departing "from the invention and that the invention is to` be limited only within theeitent set forthin the appended claims.

What is claimed is:l 1. In combination, a tractor, an implement positioned in trail-behind relationship to the tractor, means forming a connection releasable tractor and the implement.

. 4. In combination, a tractor, an implement positioned in trail-behind relationship to the tractor,"

means forming a connection releasable under overload between the tractor and the implement,

and `mea-ns for adjusting the implement com- Prising a member'adjustable in length disposed between the tractor and the implement and disconnectable from` said tractor and implement uppn release of the connection between the tractor and the implement.

5. In combination, `a tractonan implement positioned in trail-behind relationship to the trac-` tor, means forming a connection releasable under overload between the tractor and the implement,

and means for adjusting the implement compris- Y.

ing a force-receiving meansmounted on the tractor and means connecting the implement and the lforce-receiving means for adjusting the implement by a force transmitted from the force-receiving means in one direction and being releasable in the", other direction upon release oi the connection between the tractor and the imple` ment.

6. In combination, a tractor,` an implement positioned in trail-behind relationship to the tractor, means forming a .connection releasable under overloadbetween' the tractor and theimplement,

under overload between the 'tractor and the implement, and means Ior adjusting the implement comprising force-receiving means mount-, ed on the tractor and means connecting the im I plement and the force-receiving means for adjusting the implement by a force transmitted from the force-receiving `means in a direction opposed to the'line of' draft between the tractor and implement and being releasable uponlrelease of the connection between the tractor and the implement. l A

2. In combination, a tractor having apower plant, an implement positioned in trail-behind relationship to the tractor, means forming a connection releasable under overload between the tractor and the implement, and means connecting the tractor power pla'nt and the implement for adjusting the implement by a force transmitted by the power plant through the' connecting means in a directionopposed to the line of draft between the tractor and implement and being releasable upon release of the connection between the tractor and the implement.

' the connection between the and means foradjusting the implement comprising a force-receiving means connected to the tractor at a point spaced fromithereleasable' connection to the tractor and means connecting the implement and the force-receiving means for adjusting .the implement by a force transmitted from the force-receiving means` in a' direction opposed to the line of draft between tractor and implement and` being releasable upon release of 7. In combination; a tractor, an implement positioned in trail-behind relationship to the tractor, gmeans forming a connection releasable-under overload between the tractor and the implement, and means for adjusting the implement comprising a. force-receiving means connectedto the tractor at a point spaced from the releasable connection to the tractor and means connecting the implement and the force-receiving means in such tor, and links connecting the tractor and the implement, one of said links forming a connection releasable under overload between the tractor and the'implement, and the other link being adjustable in length to eiect adjustment, of the im plement.

tractor and the im- 9. In combination, a. tractor, an implement positioned in trail-behind relationship to the tractor, and links connecting the tractor and the implement, one of said links forming a connection releasable under overload between the tractor and the implement, and the other link being adjustable in length to effect adjustment of the implevment and disengageable upon release of the first link.

10. In combination, a tractor, an implement positioned in trail-behind relationship to the tractor, a hitch connection releasable under overload connected to the tractor, a longitudinally movable connection connected to the tractor, and means operatively connecting the longitudinally movable connection and the implement for adjusting the implement and releasable on release of the hitch connection.

11. In combination, a tractor, an'implement positioned in trail-behind relationship to the tractor, hitch means pivotally connected at its rear end to the implement and connected at its front end to the tractor for release 'under overload, and means for adjusting the implement comprising force-receiving means mounted on the tractor, and means extending between the forcereceiving means and the implement and having a llongitudinally movable member connected with the force-receiving means and being releasable at a location to the rear of the force-receiving means upon release of the releasable connection between the hitch means and the tractor.

12. In combination, a tractor, an implement positioned in trail-behind vrelationship to the tractor and having a rock-shaft, means operatively connecting the rock-shaft and the implement for adjusting the implement, draft means forming a connection releasable under overload between the tractor and the implement, and means for adjusting said rock-shaft comprising a longitudinally adjustable member connected to the tractor, and slide and guide means connecting the implement and the tractor for adjusting Vthe rock-shaft by movement in a line opposed to the line of draft between the implement and the tractor and being releasable on release of the draft means from the tractor.

13. In combination, a tractor, an implement positioned in trail-behind relationship' to the tractor and having a rock-shaft, means operatively connecting the rock-shaft and the implement for adjusting the implement, draft means forming a connection releasable Aunder overload between the tractor and the implement, and means for adjusting the implement comprising force-receiving means mounted on the tractor and means connecting the rock-shaft and the force-receiving means for adjusting the implement by a force transmitted from the forcereceiving means in a direction opposed to the line of draft between the tractor and the implement and -being releasable from the connection between the tractor and the implement.

14. In combination, a tractor having a power plant, an implement positioned in trail-behind relationship to the tractor, means forming a connection releasable under overload between the tractor and the implement, a force-receiving means mounted on the tractor and having a longitudinally movable part, means connecting the force-receiving means and said power plant for adjusting said longitudinally movable part by the power plant, and means for adjusting the implement comprising a sleeve adapted to receive said longitudinally movable part for adjusting the implement my movement thereof in a direction opposed to the line of draft between the tractor and the implementv and being releasable upon release of the connection between the tractor and the implement. v

15. In combination, a tractor having a hydraulic pump, an implement positioned in trailbehind relationship to the tractor and having a rock-shaft, means operatively connecting the rock-shaft and the implement for adjusting the implement, draft means forming a connection releasable under overload between the tractor and the implement, a cylinder mounted on the tractor and having a piston slidably mounted therein, a rod extending from said piston, a sleeve connected to said rock-shaft and adapted to rei ceive said rod, a conduit connecting the hydraulic pump and the cylinder for supplying fluid into the cylinder to effect adjustment of the implement, and the connections ofthe draft means and the cylinder and piston between the tractor and the implement being of such a nature that they form substantially a parallelogram.

FREDERICK L. DEWEY. 

